Cutting cylinder



June 24, 1930.

H. A. CUMFER CUTTING CYLINDER 2 Sheets-Sheet 2 Filed June 4, 1928 Patented .lune 24, 1930 UNITED STATES PATENT OFFICE HARRY A. CUMFER, OF CHICAGO, ILLINOIS, ASSIGNOR TO GUYTON & CUMFER MFG. C0., F CHICAGO, ILLINOIS, A CORPORATION 0F ILLINOIS CUTTING CYLINDER Application led June 4, 1928. Serial No. 282,777.

The present invention refers more particularly toa novel means for mounting knives upon a cutting cylinder in a removable, adjustable and/or interchangeable manner.

.15 In commercial practice, blanks, such as shingle elements and the like, are cutl from sheet material by means of a cylinder carryi ing cutting knives. Heretofore, it has been proposed to mount the knives upon such l0 cylinders by providing slots in the face of the cylinder and placing the knives in theslots, portions of the knives which engage the slots being enlarged 0r turned out to form a iiange. A block is then fitted into the slot and Vbolted to the cylinder, said block filling the slot and engaging the flange or flanges on the knife whereby the latter is secured to the roll.

There are some objections to the above described method, such as the difficulty experienced in keeping the knives rigid and in true alignment and the limited latitude of adjustment provided for the knives. Since only a limited number of slots may be provided in the cylinder the number' of positions or arrangement in which the knives may be placed `is correspondingly limited. l

It is an object of the present invention to provide means for mounting knives upon a cutting cylinder, which has certain features of novelty and utility over those known to the prior art, and which overcomes some of the objections' to structures of the prior art.

The present invention comprises positioning the knives between a series of movable plates capable of attachment to the cylinder, the lateral faces of the movable plates being caused to abut against the sides of the knives to secure them in firm manner upon the roll, the plates being wedge-locked in place.

As a feature of the present invention, knives and plates forming shingles of any given width, length. or shape may be successively mounted on a single roll.

As a further feature of the present invention, the knives will be reenforced by the sides of the plates abutting the sides of the same. eo Other objects, features and advantages of the present inventionl will be more apparent from the following detailed description.v

In thrx drawings, Fig. is a transverse sectional view of a cutting' roll illustrating the mounting of the knives according to the present invention.

Fig. 2 is a plan view of the roll opened and spread out flat illustrating the method of mounting the knives thereon.

Fig. 3 is a cross sectional view taken on 60 line 3 3 of Fig. l looking in the direction of the arrows.

Fig. 4 is an enlarged, View similar to Fig. Q.

Fig. 5 isa fragmentary sectional View taken 65 on line 5 5 of Fig. 4.

Fig. 6 is a fragmentary cross sectional view taken on line 6-6 of Fig. 4.

Fig. 7 is a perspective view of one of the block members used for mounting the knife v7o illustrated in Fig. 5..

Fig. 8 is an enlarged plan view of the knife forforming tabs and cut-outs on the shingle element illustrated in Fig. 12.

Fig. 9 is a plan view of some of the parts 75 shown in Fig. 8.

Fig. 10 is a plan view of the removable plates which hold the knives upon the cylinder.

Fig. l] is an enlarged fragmentar cross sectional view taken on line 11-11 ofy Fig. 4 showing the method of Wedging the plates shown in Fig. 10 into firm abutting relationship with the knives.

Fig. 12 is a plan' view of a shingle element 85 formed by the knives illustrated in the drawings.

Fig. 13 is a fragmentary cross sectional View taken on line 1'3-13 of Fig. 4f, showing one of the arcuate knives which is held upon the roll by the plates shown in Fig. 10.

vReferring more in detail to the drawings, l designates as a Whole a cutting roll, which mayl comprise a shaft 2, for instance, of steel,

yfragmentary plan upon which is cast or shrunk a metal shell 3, i

say of cast iron or other suitable metal. Fortions of the shell 3 may be cut away to form annular depressions 4 in which the plates 5 may be removably mounted by means of the screws 6, the latter having screw threaded engagement with the shell portion 3 of the roll 1. The stem of each of the screws 6 is preferably substantially smaller than thev diameter of the holes in the plates 5 to permit a limited amount of lateral movement of v p ed to receive the arcuate knives 9 (Fig. 4).

Certain edges of certain plates 5 may be provided with small projecting pegs or pins 7 (Fig. 10) adapted to engage elongated apertures 8 in the arcuate knives 9. The remainder of the cut away portions 4 (the space not filled by the plates 5) may be filled by one or m'ore split ring members 10 of varying width, which may be secured to the shell 3 by screws 11.

To maintain the above described assembly in a rigid and secure manner taper-headed bolts 12 may be provided, the heads of which engage certain of the plates 5 atthe cut away points 13 whereby the plates 5 which so engage the said bolt 12 will be spread apart to firmly abut the sides of the knives 9.

The particular type of cutting cylinder illustrated in the drawings is adapted, upon each revolution, to cut from a continuously advancing sheet of material four of the strip shingle elements 14 illustrated in Fig. 12. To transversely cut the continuously advancing sheet of material, knives 15, 16 and 17 may be provided. These knives `may be mounted upon the cylinder in the following Y manner: Certain portions of the shell 3 are cut away to form longitudinal slots 18 (Fig. 6). The knives 15 may have apertures 19 adapted to engage one or more pegs 21 upon a block member 20 (Figs. 5, 7 and 10). The block 20 and knife 15 may be fitted into the slot 18 in the manner shown, being retained or wedged therei-n in a secure manner by means of the taper-headed bolts 22, the heads of which fit into a tapered opening formed by the cut away portions 23 and 24 on the block 20 and the shell 3 respectively.

It will be noted that the shingle element 14 has upon one end a tab 25 and upon the other end a complementary cut-out portion 26. To provide for the tab 25 and cnt-out 26 the knife 17' may be provided. This knife 17 may be carried by a block 27 (Fig. 8). A second block 28 may be fitted inside the knife 17. The knife 16 may be fitted to the block 27 in such a manner that the ends of the knife 17 engage it to form a continuous cuttinfT edge. The assembly may be retained in such relationship by means of a pin 29 which passes through the apertures 30 in the various parts.

roll, as will be more apparent from Fig. 4, in the following manner: The block 27 may have a semi-circular beveled cut-out portion 31 (Fig. 8) and may be secured to the roll 1 by means ofl screws 32 which pass through the holesv 33. These screws 32 may be coun-v ter-sunk in a manner similar to the screws 6 which maintain the plates '5 upon the roll and may be substantially smaller in diameter than the holes 33 to permit the assembly to be laterally moved to a limited extent. A semi-circular cut-away portion, (not shown in detail) similar to the cut-out portion 31 in the block 27, may be provided in the end of the semi-circular ring 10 which is adjacent the block 27 to accommodate a taperheaded bolt 34 (Fig. 4) which functions to Wedge the Aknives 16 and 17- in a secure manner.

It will also be noted that the center of the sheet i of continuously advancing material must be severed to form upon each revolution the four separate shingle elements 14. To accomplish this, a slitter knife 35 (Fig. 1) may bemounted upon the roll in a manner similar to the knives 15. An annular slot or groove 36 may be provided in the face of the roll 1 into which may be mounted the semicircular knives 35, the latter being secured to a semi-circular block member 37 which may be provided with pegs (not shown) sim- 1la r to the type already described, said pegs being adapted to engage suitable apertures in the knives 35. Taper-headed bolts, simi- Alar to the types already described, may be used to wedge the assembly into the slot 36 1n a secure manner.

It will be apparent that the severe pressure exerted upon the` knives when cutting the sheet material, may cause them to tend to wear into the surface of the roll. To prevent such wear upon the face of the roll 1, one o1' more spht, removable sleeves 38 (Figs. 1 and 11) formed from a hard material such as forged steel or the like, may be interposed between the knives and the surface of the roll.

These sleeves 38 may be provided With holes, vor apertures 39, through which the various screws and taper-headed bolts may pass to engage the shell portion 3 of the roll 1.

While I have illust rated in Fig. l2 of the drawing a particular design or shape of strip shingle produced through the use of the cutting roll of the present invention, it is obvious that the inventive coneept of the invention is equally applicable to the manufacture and production of strips of the different commercial designs and shapes. lVhere it is desired to merely increase the width or length of the semi-hexagonal tabs and interposed cut-out portions, it may only be necessary to rearrange the knives 9, plates 5, and rings 10. here it is desired to produce a shingle of a design or shape di ll'erent than that illustrated at 14 in Fig. 12, it is only necessary io remove lill) the knives 9, and possibl knives 15, 16, and 17 plates 5, and wedge olts 12 and substitute therefor plates 5, knives 9 and bolts 12 so shaped that -when assembled-on the roll the shigle ofthe desired design or shape may be.

ma' e. j r

It is obvious that one of the principal advantages of the presenty invention is the ease v and speed with which the knives, plates and., 1o. wedge bolts can be assembled and disasselli-k bled, permitting the luse of asin le roll with different sets of knives, plates and bolts.

I claim as my invention: v

1. In combmation, a cylinder, movable plates mounted on andA secured to said cylinder in such manner as to leave spaces between adjacent plates, knives mounted in said spaces, and an adjustable wedge cooperatively associated with said vplates adapted to ruanipulated to secure the plates and kmves 1n predetermined fixed position.

2. In combination, a cylinder having an i annular depression, a hard metal cylindrical sleeve disposed in said depression, -movable plates mounted on and secured to said metal sleeve and cylinder in such manner as to leave spaces between adjacent plates, knives llnount- A ed in said spaces, and an adjustable Wedge cooperatively associated .with said plates adapt- 36 ed to be manipulated to secure the plates and knives in predetermined fixed position.

3. In combination, a cylinder, movable plates mounted on and secured to said cylinder in such manner as to leave spaces between adjacent plates, knives mounted in said spaces, said knives being ixedly secured relative to said plates through the medium of a pin and aperture engagement with the plates, f and an adjustable wedge cooperatively assocl- 46 ated with said plates adapted to be manipulated to secure the plates and knives in predetermined fixed position. In testimony whereof I a x my signature. HARRY A. CUMFER. 

